Other entities render over invisible endermen's eyes regardless of positions

The Bug

Signs render in front of the eyes of invisible endermen, even if the sign is much further back.

How to reproduce:

1. Spawn an enderman
2. Push a boat into him so he won't wander
3. Stack two blocks behind him and place a sign on top
4. Look at the enderman and run this command:

   /effect give @e[type=enderman] invisibility
   

5. Walk around to position his eyes in front of the sign
   → Notice the sign renders in front of the eyes